CN102528023A - Method for preparing alumina dispersion strengthened copper powder by means of high-energy ball milling - Google Patents
Method for preparing alumina dispersion strengthened copper powder by means of high-energy ball milling Download PDFInfo
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- CN102528023A CN102528023A CN2012100088193A CN201210008819A CN102528023A CN 102528023 A CN102528023 A CN 102528023A CN 2012100088193 A CN2012100088193 A CN 2012100088193A CN 201210008819 A CN201210008819 A CN 201210008819A CN 102528023 A CN102528023 A CN 102528023A
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Abstract
The invention discloses a method for preparing alumina dispersion strengthened copper powder by means of high-energy ball milling. The method includes steps of weighing CuO powder and Al203 powder with the weight percent content from 0.5% to 2%; placing mixed powder of CuO and Al203 into a ball mill to realize ball milling; and then placing the mixed powder after being in ball milling into hydrogen stream, reducing the mixed powder in the hydrogen stream for 40 minutes to 60 minutes at the temperature ranging from 700 DEG C to 800 DEG C, and obtaining the Al203 dispersion strengthened copper powder. When the mixed powder of the CuO and the Al203 is in ball milling in the ball mill, ball-to-material ratio ranges from 10 to 12.1, rotation speed of the ball mill ranges from 350 revolutions per minute to 400 revolutions per minute, and ball milling time ranges from 20 hours to 40 hours. CuO replaces Cu, and dispersion phase of obtained Al203 is distributed in a matrix more uniformly. As CuO is softer than the pure Cu, ball milling time is short, but a good dispersion effect is realized. The method is simple in process and low in cost.
Description
Technical field
(Oxide Dispersion Strengthened, ODS) powder preparation technical field relate in particular to a kind of method that adopts high-energy ball milling to prepare the alumina dispersion-strenghtened copper powder to the present invention relates to oxide dispersion intensifying.
Background technology
Stable, even, tiny oxide particle is introduced in dispersion-strengtherning in metallic matrix, pinning dislocation, crystal boundary, sub boundary hinder moving of dislocation, thus the method for strengthening material.Dispersion-strengthened Cu since in the copper matrix disperse tiny and uniform oxide particle that distributing, its intensity is higher, softening temperature is high; The oxide particle of small and dispersed distribution simultaneously can not cause harmful effect to the electrical and thermal conductivity of copper alloy itself again, makes dispersion-strengthened Cu when improving intensity, can also keep self excellent electrical and thermal conductivity.Therefore, dispersion-strengthened Cu is comprehensive electric conductivity, thermal conductivity, room temperature and elevated temperature strength, hardness and wearability, resistance fusion welding can the highest copper alloy.
The technology of preparation dispersion-strengthened Cu is mainly mechanical alloying method at present, is about to nanometer Al
2O
3Powder and copper powder are put into high energy ball mill and are carried out high-energy ball milling, harder nanometer Al in the mechanical milling process
2O
3It is inner that pruinescence is ground to softer copper powder, forms Al
2O
3Equally distributed dispersion-strengtherning copper powder in copper powder.The dispersion-strengthened Cu performance of this method preparation improves, but also has certain defective, and cost is higher, and ma process is wayward, promptly in mechanical milling process, still keeps away unavoidable Al
2O
3Still there is the Al of larger particles in the reunion of powder in the dispersion-strengtherning copper powder of preparation
2O
3Powder.The disperse degree is even inadequately, does not reach performance requirement.
Summary of the invention
The present invention is higher in order to solve in the existing method for preparing dispersion-strengthened Cu cost, Al
2O
3Powder.The disperse degree is even inadequately, does not reach the technical problem of performance requirement, proposes that a kind of technology is simple, with low cost, the disperse degree adopts high-energy ball milling to prepare the method for alumina dispersion-strenghtened copper powder uniformly.
For solving said problem, a kind of method that adopts high-energy ball milling to prepare the alumina dispersion-strenghtened copper powder that the present invention proposes, its step comprises:
Step 1 takes by weighing CuO powder and Al
2O
3Powder, wherein, Al
2O
3The weight percent content of powder is 0.5%～2%;
Step 2 is with CuO and Al
2O
3Mixed-powder put into the ball mill ball milling, ratio of grinding media to material is 10～12: 1, drum's speed of rotation is 350～400 rev/mins, the ball milling time is 20～40 hours;
Step 3, then that ball milling is good mixed-powder places hydrogen stream, 700～800 ℃ of reduction 40～60 minutes, obtains Al
2O
3The dispersion-strengtherning copper powders may.
More excellent, in the said step 2,, shut down 1 hour the every ball milling of mixed-powder 5 hours.
More excellent, described ball mill is a planetary high-energy ball mill.
The present invention compares with traditional mechanical alloying, adopts CuO powder and Al
2O
3The common ball milling of powder replaces metal Cu powder and the dispersed oxide common ball milling of powder mutually.Because the CuO powder is softer than Cu powder, therefore, in the process of high-energy ball milling, disperse phase Al
2O
3Enter into the CuO powder more easily and then wrapped up resulting disperse phase more even distribution by the CuO powder.And the Al that is wrapped
2O
3Powder in mechanical milling process not can with other Al
2O
3Reunite, suppressed growing up of disperse phase, resulting disperse phase particle is tiny.The present invention adopts CuO replaced C u, the Al of gained
2O
3The more even distribution of disperse phase in matrix.Because CuO is softer than pure Cu, during ball milling institute's time spent few, and the disperse that obtains is effective.Established technology is simple, with low cost.
The specific embodiment
Embodiment 1:Make 0.5% Al
2O
3The dispersion-strengtherning copper powder
Testing used raw material is CuO powder and Al
2O
3Powder, the purity of using powder is all greater than 99.9%, and wherein the granularity of CuO powder is 10 μ m, Al
2O
3The granularity of powder is 30nm.
Take by weighing a certain amount of CuO powder and Al
2O
3Powder guarantees Al
2O
3At Cu-Al
2O
3Weight percent content in the system of mixed-powder is 0.5%.
Put into the planetary high-energy ball mill ball milling to mixed-powder, ratio of grinding media to material is 10: 1, and the rotating speed of ball mill is 350r/min, and the ball milling time was controlled at 40 hours, did not comprise downtime.Every ball milling was shut down 1 hour in 5 hours, and is too high to prevent the ball grinder temperature.Then that ball milling is good mixed-powder places hydrogen stream, at 700 ℃, and reduction 60min.Obtain Al at last
2O
3The dispersion-strengtherning copper powder.
Embodiment 2:Make 1.25% Al
2O
3The dispersion-strengtherning copper powder
Testing used raw material is CuO powder and Al
2O
3Powder, the purity of using powder is all greater than 99.9%, and wherein the granularity of CuO powder is 10 μ m, Al
2O
3The granularity of powder is 30nm.
Take by weighing a certain amount of CuO powder and Al
2O
3Powder guarantees Al
2O
3At Cu-Al
2O
3Weight percent content in the mixed-powder system is 1.25%.
Put into the planetary high-energy ball mill ball milling to mixed-powder, ratio of grinding media to material is 11: 1, and the rotating speed of ball mill is 375r/min, and the ball milling time was controlled at 30 hours, did not comprise downtime.Every ball milling was shut down 1 hour in 5 hours, and is too high to prevent the ball grinder temperature.Then that ball milling is good mixed-powder places hydrogen stream, and at 750 ℃, reduction 50min obtains Al at last
2O
3The dispersion-strengtherning copper powder.
Embodiment 3:Make 2% Al
2O
3The dispersion-strengtherning copper powder
Testing used raw material is CuO powder and Al
2O
3Powder, the purity of using powder is all greater than 99.9%, and wherein the granularity of CuO powder is 10 μ m, Al
2O
3The granularity of powder is 30nm.
Take by weighing a certain amount of CuO powder and Al
2O
3Powder guarantees Al
2O
3At Cu-Al
2O
3Weight percent content in the mixed-powder system is 2%.Put into the planetary high-energy ball mill ball milling to mixed-powder, ratio of grinding media to material is 12: 1, and the rotating speed of ball mill is 400r/min, and the ball milling time was controlled at 20 hours, did not comprise downtime.Every ball milling was shut down 1 hour in 5 hours, and is too high to prevent the ball grinder temperature.Then that ball milling is good mixed-powder places hydrogen stream, and at 800 ℃, reduction 40min obtains Al at last
2O
3The dispersion strengthened iron copper powder.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. method that adopts high-energy ball milling to prepare the alumina dispersion-strenghtened copper powder, its step comprises:
Step 1 takes by weighing CuO powder and Al
2O
3Powder, wherein, Al
2O
3The weight percent content of powder is 0.5%～2%;
Step 2 is with CuO and Al
2O
3Mixed-powder put into the ball mill ball milling, ratio of grinding media to material is 10～12: 1, drum's speed of rotation is 350～400 rev/mins, the ball milling time is 20～40 hours;
Step 3, then that ball milling is good mixed-powder places hydrogen stream, 700～800 ℃ of reduction 40～60 minutes, obtains Al
2O
3The dispersion-strengtherning copper powders may.
2. the method for claim 1 is characterized in that, in the said step 2, to the every ball milling of mixed-powder 5 hours, shuts down 1 hour.
3. the method for claim 1 is characterized in that, described ball mill is a planetary high-energy ball mill.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100088193A CN102528023A (en) | 2012-01-12 | 2012-01-12 | Method for preparing alumina dispersion strengthened copper powder by means of high-energy ball milling |
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|---|---|---|---|
| CN2012100088193A CN102528023A (en) | 2012-01-12 | 2012-01-12 | Method for preparing alumina dispersion strengthened copper powder by means of high-energy ball milling |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921954A (en) * | 2012-11-13 | 2013-02-13 | 中南大学 | Method of producing 'shell - nuclear structure' nanometer molybdenum copper composite powder in low temperature |
| CN103934451A (en) * | 2014-04-03 | 2014-07-23 | 广东省工业技术研究院(广州有色金属研究院) | Method for preparing aluminum oxide dispersion strengthening copper alloy powder |
| CN104480339A (en) * | 2014-12-31 | 2015-04-01 | 扬州立德粉末冶金股份有限公司 | Method for preparing aluminum carbide dispersion-strengthened copper |
| CN107559358A (en) * | 2017-07-31 | 2018-01-09 | 山东金麒麟股份有限公司 | A kind of powdered metallurgical material and purposes for elevator brake block |
| CN109136615A (en) * | 2018-10-30 | 2019-01-04 | 江西理工大学 | A kind of multistep ball milling prepares the preparation method of nano-ceramic particle dispersed and strengthened copper-based composite material with multistep vapour phase reduction |
| CN112322922A (en) * | 2020-11-14 | 2021-02-05 | 中国兵器科学研究院宁波分院 | Powder metallurgy preparation method of dispersion copper-copper laminated composite material |
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| JPH0762467A (en) * | 1993-08-25 | 1995-03-07 | Toshiba Corp | Dispersion-strengthening type copper alloy and its production |
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| JPH0762467A (en) * | 1993-08-25 | 1995-03-07 | Toshiba Corp | Dispersion-strengthening type copper alloy and its production |
Non-Patent Citations (3)
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| 《金属功能材料》 20090430 王东里等 Al2O3 弥散强化铜基复合材料的制备及性能研究 第21-25页 1-3 第16卷, 第2期 * |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921954A (en) * | 2012-11-13 | 2013-02-13 | 中南大学 | Method of producing 'shell - nuclear structure' nanometer molybdenum copper composite powder in low temperature |
| CN103934451A (en) * | 2014-04-03 | 2014-07-23 | 广东省工业技术研究院(广州有色金属研究院) | Method for preparing aluminum oxide dispersion strengthening copper alloy powder |
| CN103934451B (en) * | 2014-04-03 | 2016-01-27 | 广东省工业技术研究院(广州有色金属研究院) | A kind of preparation method of alumina dispersion-strenghtened copper alloyed powder |
| CN104480339A (en) * | 2014-12-31 | 2015-04-01 | 扬州立德粉末冶金股份有限公司 | Method for preparing aluminum carbide dispersion-strengthened copper |
| CN107559358A (en) * | 2017-07-31 | 2018-01-09 | 山东金麒麟股份有限公司 | A kind of powdered metallurgical material and purposes for elevator brake block |
| CN107559358B (en) * | 2017-07-31 | 2020-01-03 | 山东金麒麟股份有限公司 | Powder metallurgy material for elevator brake pad and application |
| CN109136615A (en) * | 2018-10-30 | 2019-01-04 | 江西理工大学 | A kind of multistep ball milling prepares the preparation method of nano-ceramic particle dispersed and strengthened copper-based composite material with multistep vapour phase reduction |
| CN109136615B (en) * | 2018-10-30 | 2020-10-13 | 江西理工大学 | Preparation method of high-strength high-plasticity dispersion-strengthened copper-based composite material |
| CN112322922A (en) * | 2020-11-14 | 2021-02-05 | 中国兵器科学研究院宁波分院 | Powder metallurgy preparation method of dispersion copper-copper laminated composite material |
| CN112322922B (en) * | 2020-11-14 | 2022-04-22 | 中国兵器科学研究院宁波分院 | Powder metallurgy preparation method of dispersion copper-copper laminated composite material |
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Address after: 528216 Guangdong Province, Foshan City Hardware Industrial Zone, Danzao Town Nanhai District Bo Jin Road No. 6 Applicant after: Guangdong King-Strong Material Engineering Co., Ltd. Address before: 528216 Guangdong Province, Foshan City Nanhai District Danzao Daikin Industrial Zone Applicant before: King-Strong Tools and moulds Co., Ltd. |
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Application publication date: 20120704 |